145
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It ends with a 2, so it must be rounded down to 840.
It is already rounded to the nearest ten as 840
840
842 to the nearest 1000 is 1000. When rounding to the nearest 1000, we look at the hundreds place of the number in question. Since the hundreds place in 842 is less than 500, we round down to the nearest 1000, which is 1000.
How do you round 392 to the nearest ten